In a move that will increase regulator scrutiny of hedge funds, the U.S. Securities and Exchange Commission voted 3-2 yesterday to approve a Dodd-Frank Act measure requiring private fund advisers to register with the agency.

The ruling will affect about 750 advisers, calling for them to register by March 30 and to disclose “census-like data” about investors and employees, assets under management, potential conflicts of interest and non-fund advising activities.

“Many of these private fund advisers will now not only register with the commission, but be subject to its rules, its regulatory oversight and its examination program,” said SEC Chairman Mary Schapiro said before the vote Washington. “Today’s rules will fill a key gap in the regulatory landscape.”

Some advisors—including venture capital fund advisers, foreign advisers without a U.S. business and advisers with less than $150 AUM—are exempt from the ruling but are still required to file some of the information.

Bloomberg quotes Schapiro as saying the SEC is after data “that would aid investors and assist our regulatory and examination efforts without requiring any disclosure that could inadvertently harm the interests of private fund investors.”